The Explanation Of Command Order; The Detail Explanation Of Basic Structure Of Ladder Diagram - Delta C2000 series User Manual

The explanation of command order:

1 LD
2 OR
3 AND
4 LD
AND
ORB
5 LD
AND
6 LD
AND
ORB
7 ANB
8 OUT
TMR

The detail explanation of basic structure of ladder diagram

1.
LD (LDI) command: give the command LD or LDI in the start of a block.
The structures of command LDP and LDF are similar to the command LD. The difference is that
command LDP and LDF will act in the rising-edge or falling-edge when contact is ON as shown in
the following.
Rising-edge
X0
OFF
2.
AND (ANI) command: single device connects to a device or a block in series.
The structures of ANDP and ANDF are the same but the action is in rising-edge or falling-edge.
3.
OR (ORI) command: single device connects to a device or a block.
The structures of ORP and ORF are the same but the action is in rising-edge or falling-edge.
X0
M0
X1
X3
M1
Y1
X4
T0
M3
Y1
T0 K10
LD command
AND Block
Time
ON
OFF
AND command
OR command OR command
Chapter 16 PLC Function C2000 Series
LD command
OR Block
X0
OFF
AND command
OR command
16-13
Falling-edge
Time
ON
OFF